Note that this Fast Letter is not "binding law" but, rather, a statement of VA procedures. It seems to indicate that claims that "reasonably" raise TDIU claims will be met with a request to submit a form for TDIU (and, in absence of a response, the claim will be "administratively closed.").
I think that this does not derogate from the VA's requirement to consider TDIU claims if reasonably raised by the evidence gathered or submitted prior to a BVA "VA final decision." Still, it is in claimant's/Veteran's interest to submit a specific claim if they want the VA to consider an award based on TDIU.
I think that this does not derogate from the VA's requirement to consider TDIU claims if reasonably raised by the evidence gathered or submitted prior to a BVA "VA final decision." Still, it is in claimant's/Veteran's interest to submit a specific claim if they want the VA to consider an award based on TDIU.